Go语言：nil切片和空切片

参考引用：

---

package main

import (
 "fmt"
 "reflect"
 "unsafe"
)

func main() {

 var s1 []int
 s2 := make([]int,0)
 s4 := make([]int,0)
 
 fmt.Printf("s1 pointer:%+v, s2 pointer:%+v, s4 pointer:%+v, \n", *(*reflect.SliceHeader)(unsafe.Pointer(&s1)),*(*reflect.SliceHeader)(unsafe.Pointer(&s2)),*(*reflect.SliceHeader)(unsafe.Pointer(&s4)))
 fmt.Printf("%v\n", (*(*reflect.SliceHeader)(unsafe.Pointer(&s1))).Data==(*(*reflect.SliceHeader)(unsafe.Pointer(&s2))).Data)
 fmt.Printf("%v\n", (*(*reflect.SliceHeader)(unsafe.Pointer(&s2))).Data==(*(*reflect.SliceHeader)(unsafe.Pointer(&s4))).Data)
}

输出：

s1 pointer:{Data:0 Len:0 Cap:0},